arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2210.06337math.AP
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动力学方程中只有水平粘性的大尺度湿大气系统的全局适定性

Global well-posedness of large scale moist atmosphere system with only horizontal viscosity in the dynamic equation

Shenyang Tan, Wenjun Liu

摘要:

为了寻找一个更好的物理模式来描述大尺度云水转化和降水过程,我们考虑了一个由动力学方程中只有水平粘性的原始方程和一组描述水汽、雨水和云凝结物的湿度方程组成的湿大气模式。为了克服动力学方程中没有垂向粘性所带来的困难,将粘性消元法与$z-$弱解方法相结合,利用广义Bihari-Lasalle不等式,得到了$v$在$H^{1}$空间中的局部存在性.然后,在初始数据具有较高正则性的假设下,得到了$v$的全局存在性.进而得到了整个系统拟强解和强解的存在性。通过适当地引入两个新的未知量,利用单调算子理论克服了源项中的赫维赛德函数所带来的困难,得到了解的唯一性.

英文摘要:

In order to find a better physical model to describe the large-scale cloud-water transformation and rainfall, we consider a moist atmosphere model consisting of the primitive equations with only horizontal viscosity in the dynamic equation and a set of humidity equations describing water vapor, rain water and cloud condensates. To overcome difficulties caused by the absence of vertical viscosity in the dynamic equation, we get the local existence of $v$ in $H^{1}$ space by combining the viscous elimination method and the $z-$weak solution method and using the generalized Bihari-Lasalle inequality. And then, we get the global existence of $v$ under higher regularity assumption of initial data. In turn, the existence of quasi-strong and strong solutions to the whole system is obtained. By introducing two new unknown quantities appropriately and utilizing the monotone operator theory to overcome difficulties caused by the Heaviside function in the source terms, we get the uniqueness of solutions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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